Cleaning up memory

The Official Words from Apple

https://support.apple.com/en-ca/guide/system-information/syspf9b375b9/11.0/mac/11.0

• Other: Contains files that don’t fall into the categories listed here. This category primarily includes files and data used by the system, such as log files, caches, VM files, and other runtime system resources. Also included are temporary files, fonts, app support files, and plug-ins. You can't manage the contents of this category. The contents are managed by macOS, and the category varies in size depending on the current state of your Mac.

What is Other on Mac Storage?

The "Other" storage category on Mac consists of files that do not easily fall into the clearer category labels like "Audio."

The types of "Other" files would include: 

• Cache files like user cache, browser cache, and system cache.

• Documents like PDF, .psd, .doc, etc.

• Disk images and archives like .zip and .dmg.

• macOS system and temporary files.

• App plugins and extensions.

• Everything else that doesn’t fit into the main macOS categories.

After deleting files using the Finder on Mac, don't forget to empty the trash. That will eliminate the file and free up some drive space.

Be very wary of running any “cleaning”, “speed-up” or “optimizing” apps. These are dangerous and considered by many to be as close to malware as you can get. 

An app like OmniDiskSweeper might be helpful to you. You can find that at this link:

click > https://www.omnigroup.com/more

Also, just to clarify for you, memory is in your RAM. What you are talking about is called storage (or available space on the HD).